Gramophone mechanism.



PATBNTED MAR, l2, 1907.

' E. WAWRINA.

GRAMOPHONE MBCHANISM. ArrLzcATIoN FILED Nov. '1. 1905.

3 SHEETS-SHEET 1.

L/M Jua @@W nu Nahms n :was rn.. fummo/olv, a cA PATENTBD MAR. 12, 1907.

E. WAWRINA.

GRAMOPHONE MECHANISM.

APPLICATION FILED NOV. 7. 1905.

3 SHEETS-SHEET 2.

PATBNTBD MAR. l2, 1907.

E. WAWRINA. A

GRAMOPHONE MEGHANISM. APPLIOATION FILED Nov.1. 190s.

3 SHEETS-SHEET 3.

Zyf

12121155555 lTm/mzn me; fwd M Zb/,f/ZZ, yfwww am EDUARD WAWRINA, OF VIENNA, AUSTRIA-HUNGARY C-FIAIVIOPHONE NIECHANISNI.

Specification of Letters Patent.

:atenten Maren 12, 1907.

Application filed November 7. 1905. Serial No. 286.306.

Be it known that I, EDUARD WAwmxA,

mechanician, a subject of the Emperor of Austria, residing in Vienna. VI., Gumpendorferstrasse 32,Austria-Hungary, have invented new and useful Improvements in or Relating to Gramophone Mechanism; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use .the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

The object of the present invention consists of a receiver mechanism for gramophones in .which a displacing mechanism directly operated by the motion of the plate and csmprising a rotary part engaging the plate causes the receiving-trumpet, connecte-.fl in the usual manner with the reverberator and the stylus, to ossess a motion toward the middle of the p ate, and thus force. the stylus to engrave spiral courses on the plat-e.

In the drawing the object of the invention -is illustrated in'three eonstructional forms tion of the central pivot 2.

by way of exam le.

Figures 1 an( 2 illustrate one constructional form in lan view and i n side elevation and partialpsection, whereas Figs. 3 and 4 illustrate details of the apparatus. Figs. 5 to 7 show a second constructional form o1" the invention in longitudinal section, `side elevation, and plan, respectively, while Figs. 8 and 9 illustrate the third constructional modification, and Figs. 10 and 11 illustrate further details of the apparatus.

The lat-e or record-tablet l, operated in the we -known manner by means of clockwork or the like, possesses a groove arranged concentrically to the opening for the recep- By means of this groove a hub is formed, the outer edge of whereof is sloped off, so that it forms a cone or friction wheel 3. With this projection a cone or friction wheel 5, bearing a wormwheel 4, engages, said cone-wheel being preferably supported in the fork end Gl of a revoluble arm 7, connected with the gramophonebox.

In order to maintain the two above-menl tloned wheels continuously 1n engagement --with each other, there is provided a pivot 8, fixed to the end of the arm 6, forming the bearing, which pivot slides on the periphery of the plate-aperture 9, and thereby assures l,Cnadilally toward the middle of the plate.

the connection of the cone-wheels, which can, moreover, be adjustedrelatively to each other by adjust-ment of the screw 18. At the free end of the supporting-arm 7 is provided a cylinder 10, which again supports a second cylinder 11, in which a pivot 13, supporting the trumpet, is ca able of being secured at the desired height by means of a set-screw. To the inner cylinderll afore- 6'5 said there is attached an arm 15, which sup- A ports a toothed rack at its end, which rack. engages with the aforesaid 'worin-wheel 4.

The o eration of the device for the forming of reQor s is follows ,By means of the setscrew 14 the trumpet 12 is so adjusted that the stylus placed upon the outer edge of the plate '1 presses upon it with the required pressure. The plate 1 is then rotated in the well-known manner, whereby the cone-wheel 3 5 aforesaid also receives rotary motion, and by means of the worin-wheel 4 and curved rack 16 the arm 15 and also (by the turning of the trumpet 12) the stylus are drawn 8o From these two motions there results a spiral drawn by the stylus. By suitably adjusting the gearing the mutual distance betweenthe separate spirals can be regulated at will.

In a constructional modification, Figs. 5-7, a plate is provided which has at its center either a projecting journal-box or a hub. Insteed of the cone-wheels above described there is in this modification provided a friction-wheel adapted to revolve either'against the plate or in a groove on the plate, which friction-wheel is maintained constantly at thesame distance from the pivot 2 of revolution by means of a bow 20, connected with the mainbearing or simply supported on the central pivot 2. The friction-wheel 5 aforesaid is provided in the inside of the hub with a threading 21, by means of which when the said wheel 5 is revolved a tooth-rack 16 is operated, and thereby the trumpet is moved with it toward the middle of the plate. The operation of this modification is identical with that of the one first described, and Jthe bow 20 may also be connected in any other convenient manner with the revolving pivot 2 or the central aperture 9.

In another modification, Figs. 8-12, the driving of the apparatus is effected as a1- ready set forth but there isa spindle 16 or toothed rack which can be placed between 1ro two arms 22 and 23, which arms may form, if desired, a fixed frame. These are con-U IOO nected with an axle 24, Which is itself ad- Q j ustably supported upon another arm 7, provided with a side arm. On this axle the trumpet is supported, or it may rest upon the rigid arms 22 23 aforesaid. In order to render the interchange of the membrane easier and to effect the engagement and-disengagement of the apparatus more easily, the axle supporting the trumpet and the bent tube is arranged revolubly. The limitation of the motion hereof is provided for by having in the frame a slot 28 and'a pin 29, which pin 29 is attached to' the supporting-axle 27.l More over, it appears ol'ten desirable to prevent the pressure of the membrane 31, for which purpose there is arranged a revoluble bow 30, by aid of which the center of gravity can be altered at will, and thus the pressure can also be regulated as desired. Any other loading of themembrane 30 is thus rendered unnecessai-y.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination of a gramophone and its rotary record-tablet, a movable stylussup orting member, means for supporting sai member, and means, operative from sgr-id tablet and comprising a rotary part engaged with the tablet, for moving the stylus relatively to the tablet, substantially as described.

2. The combination of a gramophone and its rotary record-tablet having a concentric hub, a movable stylus-supporting member,

meansl for supporting the said member and 1 means, operative from said hub and comprising a rotary part engaged with the tablet,

for moving said member on its pivot whereby to effect a movement of the stylus relatively to the tablet, substantially as described.

3. The combination of a gramophone and its rotary record-tablet, a pivoted stylus-supporting member and means comprising a rotary toothed part engageable with the tablet and a rack controlling said stylus-supporting member, for moving said member on its pivot and thus moving the stylus relatively to the tablet, substantially as described.

4. The combination of a gramophone and itsrotary record-tablet, an arm, means for supporting said arm, a rotary toothed part engageable with the tablet and journaled in said arm, a stylus-supporting.member fulcrumed in said arm and-"-arack carried b said member and engaging said toothed part, substantially as described.

5. The combination ofa gramophone and its rotary record-tablet, an arm, means for supporting said arm, said tablet having a concentric hub, a rotary toothed part engaging the hub and j ournaled in said arm, means for maintaining said part in engagement with the hub, a stylus-supporting member fulcrumed in said arm and a rack carried by said member and engaging said toothed part, substantially as described.

' In testimony that I claim the foregoing I Y have hereunto set my hand this 21st day of October, 1905.

EDUARD WAWRIN A.

Witnesses:

OMioN ST. A. DURR, ALvns'ro S. HOGUE. 

